Press Fit Pin - Forces

Here's another:

http://www.engineersedge.com/calculators/machine-design/press-fit/press-fit-calculator.htm

thanks a lot for this useful calcultor.

What a great link, with tons of information!!!

The calculators give the force for installation of the pin. When you try to pull it out the initial force is a lot higher since you start from a static friction with coefficients 2...3 x higher than the sliding coefficient considered for installation. Pay attention if not it will not be possible to take it off!

Thank you for providing the great calculators and the reference websites. Great information in my opinion.

I also want to note that I realize that no calculator is perfect and there will always be differences between theoretical calculations and real world situations.

However, having said that, I also believe that a calculator (or, more generally stated, engineering equations or formulas based on theory and empirical / test information) are invaluable engineering tools to be used as starting points for real world designs.

I am anxious to find out if the 10% or 20% inaccuracy you expect between the calculated and real world forces are due in large part to the differences between static and sliding friction as mention in one of the replies.

Thanks for all the feedback on this question.

Seibert

No the 20% is an error due to other factors. The difference between static and dynamic friction is 200 to 300%!!!!!